Question

РЕШИТЕ УРАВНЕНИЯ:

⦁ 5(7 – 3Х) + 7(2 + 2Х) = 0
⦁ 9(3 – 2Х) +5 (3Х + 5) = 7

Answer 1

5(7-3x)+7(2+2x)=0

35-15x + 14+14x =0

49-x=0

x=49

9(3-2x)+5(3x+5)=7

27-18x+15x+25=7

52-3x=7

-3x=7-52

-3x=-45

x=15